Plate fillet weld polishing numerical control machine tool based on profile measurement and machining method

The invention provides a plate fillet weld polishing numerical control machine tool based on profile measurement and a machining method. The plate fillet weld polishing numerical control machine tool based on profile measurement comprises a machine tool bed, a workbench, a workpiece positioning fixture, a polishing head, a sliding table, a sliding table driving device, a vertical column, a vertical column driving device, a polishing wheel dressing device and a workbench driving device, wherein the workbench, the vertical column, the vertical column driving device and the workbench driving device are arranged on the machine tool bed, the polishing wheel dressing device is arranged on the workbench, and the workbench driving device is used for driving the polishing wheel dressing device to move in the X-axis direction of the machine tool bed through the workbench; the vertical column driving device drives the vertical column to move in the Y-axis direction of the machine tool bed; the polishing head is connected with the vertical column through the sliding table, and the sliding table driving device is used for driving the polishing head to move in the Z-axis direction of the machine tool bed; the workpiece positioning fixture is used for positioning and clamping a fillet weld plate to be polished. The plate fillet weld polishing numerical control machine tool based on profile measurement can be used for completing fillet weld polishing of various types of workpieces in a self-adaptive mode, and has very good machining flexibility.